Pump.



[NVENTOR PATENTED MAR. 6, 1906.

PUMP.

:m 2@ o a E. M. NEVINS.

APPLIOATION rILm) JAN. 4. 1905. mwzzwm nao. 21.1905.

FI E I d e fl UNITED sTATEs PATENT OFFICE,

TEXA& SSIGNOR TOACME MANUFAC- BEAUMONT. TEXAS.

PUMP.

Speciflcation of Letters Patent.

rai-.emen meren 6, 1906` pnlicatinn filed January i. 1995. Eenewed December 21, 1905. Serial No. 292.788

To all whom it may conoern:

Be it known that I, ENNIS M. NEVINS, e citizen of the United States, residingat Beaumont, in the county of Jeierson and State of Texas, have invented certain new and useful Improvements in Punps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to punps for oil or water; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

Figure 1 is a vertical sec- Fg. 2 s a cross-sectaken on the line a; x

In the drawings, tion through the pump. tion through the pump, in Fig. 1.

A s a section of the tubing of the well, and B is a lower section "of the` tubing, which is perforatecl anal which is connected to the section A by a tube-cou ling collar C.

D is a cylindrica bush provided with ,a flange d, which is Secured between the tubesectons A end B. This bush is provided with a eonical seat e at its upper part.

E is a base provided wit a seat f, which comes down onto the seat e, so that the base is supported by the bush D. This base has e passage G, and g is the suction-valve, which opens upward and which normally oloses the said passage G.

H is a pump-barrel, the lower end portion of which is Secured to the base E. This u'mp-barrel has an inwardly-projectng ring at its up er part. I is a re ief-valve for air, which is erren ed in asmall chamber'i in the ringh and provi ed with passages, so that when air accumulates under ressure in the unp-barrel the valve l. will rse and let the air pass from the pum harroi into the space between it and the tu ing. The air-passage 'i' is in the wall of the punp-lmrrcl, and es no rojection is formed outsilc the burrel it can e arranged close to the casing. The valve I is light, and the airpassages are small, but they are suflicient to ct out a small stream otair and gas at all times, and they do not let ont any material quantity of oil when the pump is at work.

J 'i'c resents amular chaml'ers forned by inw arlly-projecting rings which are Secured to or l'ormed integral with tlo uppe' end portion ol' the punp-lm'rcl.

Krepresents packin -rings of any approved Construction, which t closely around the pump-plunger N in the chambers J. These packng-rings are free to slide in the said charnbers to a limited extent, and they have conical seets n at their lower edges, which hear on the beveled edges of the rngs j. These ringsrise when there is too much pressure in the pump-barrel durinl the (lescent of the plunger. These rings and the small ballvalve I can be used on the same pum if desiredi The hall-valve I is light, an t has very small passages; but it is su'llicient to allow all air and gas iven off by the oil in the well to pass upwar through the pump barrel while the pum'p is not at'work. The rings K only come into action as air-relief valves during the descent of the plunger and when the pressure in the barrel is excessive, as the said rings are comparatively heav and considerahl'e pressure is required to orce them upward fromtheir seats. The escape-passage of the valve I is too small to afio'd any effective relief from excessive pressure durin the descent of the plun er, and the rings are too hard to raise to et out any gas while the ,pump is not at work.

The unp-plunger N has an outwardlyprojectmg ring p sorewed on its lower end portion in the path of and under the ring h on the pump-barrel.

P is the delivery-valve, which is of any approved constructon and which is carried by the pump-plunger. v

R is a cage secu'eclto the upperend portion of the pump-plun er, and r is a tubular plunger or pump-rod w 'ch is screwed to the said. cage.

The whole pump, including the suctionvalve and its seat, can be removed by means of the pump-rod whenever desired. The tubing is not listurbed when the pump is removed, and the perforated section of the tubin can be cleaned out with great faoility.

%What I claim is- 1. In a pump, the combination, with a pump-barrei rovided with an air-outlet passage in :its si( e wall, of a ring securel inside the upper art of the said barrel and provided e with e 'va ve-chamber which comnunicates with the said outlet-passage, said ring 'having also a valve-seat and an air-passage, an airrelief valve normally testing on the said seat, and a pump-plunger slidahlein the said barrel.

2 &14,312

2. In a pump, the combination, with a rings bein free to rise when the pressure in o pump-bar'el provided With a suction-valve the pumparrel is excessive.

at its lower part and a series of annular cham- .In testimony whereof I have aflixed my bers and ring at its upper part, of a slidable signature in the presence of two witnesses. pump plunger provided With a delivery- ENNIS M NFVINS valve, and packing-rings arranged in the said ehambers and fittng around the said plunger witnesses:

and rovided with seats at their lower edges L C. CREIGHTON, which rest on the said rings, said packng- I. L. CREIGHTON. 

